Flameproof, aliphatic polyketone materials, moulded articles produced therefrom and also method for the production thereof
AssigneeEms-Patent AG
InventorGeorg Stöppelmann
Life of this patent
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Abstract
The present invention relates to polyketone molding compounds based on partially crystalline, aliphatic polyketones. In particular, it relates to halogen-free, flameproof molding compounds based on aliphatic polyketones which preferably comprise salts of phosphinic acids as flame retardant. The molding compounds fulfill the fire protection classification V0 according to UL94 and display good mechanical properties. These molding compounds are suitable for the production of in particular thin-walled molded articles for the electrical and electronics industry, such as for example housings, housing components or connectors.
Claims16
A flameproof polyketone moulding compound consisting of:
- (A) 30-94% by weight of at least one partially crystalline, aliphatic polyketone with a melting temperature (Tm) in the range of 180° C.-280° C., measured by means of DSC according to ISO 11357-3 and at a heating rate of 20 K/min;
- (B) greater than zero to 50% by weight of at least one filling- or reinforcing material;
- (C) 6-15% by weight of at least one halogen-free flame retardant;
- (D) 0-2.0% by weight of at least one organic phosphite and/or phosphonite;
- and
- (E) greater than zero to 10% by weight of at least one additive;
- the percentages by weight of components (A) to (E) together producing 100%;
- and wherein the polyketone moulding compound is free of magnesium hydroxide;
- wherein the at least one halogen-free flame retardant (C) is selected from the group consisting of at least one phosphinic acid, at least one diphosphinic acid, a metal salt or an organic derivative thereof, and mixtures or combinations thereof, optionally in combination with a synergist;
- and
- wherein the at least one additive (E) is selected from the group consisting of stabilisers, antioxidants, processing aids, polymers different from aliphatic polyketones, acid- or anhydride-modified polyolefins, polyesters, polyamides, impact modifiers, adhesives, crystallisation accelerators or retarders, flow aids, lubricants, mould-release agents, plasticisers, radical interceptors, antistatic agents, pigments, colouring- and marking substances, nanoparticles in laminar form, layer silicates, conductivity additives, residues from polymerisation processes, oxygen-, nitrogen- or sulphur-containing metal compounds, regulators, and mixtures or combinations thereof.
Dependencies are inferred from the claim text.